TY  - JOUR
AU  - H. Hamilton
TI  - Permutability of congruences on commutative semigroups.
JO  - Semigroup forum
PY  - 1975
SP  - 55
EP  - 66
VL  - 10
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1975__10_134099/
ID  - SF_1975__10_134099
ER  -